package com.xwks.handler;

import com.alibaba.fastjson.JSON;
import com.xwks.common.Result;
import com.xwks.util.JwtUtil;
import com.xwks.util.RedisUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.TimeUnit;

@Component
public class LoginSuccessHandler implements AuthenticationSuccessHandler {

    @Autowired
    private JwtUtil jwtUtil;

    @Autowired
    private RedisUtil redisUtil;

    private final static String KEY = "key:";

    @Override
    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
        response.setContentType("application/json;charset=UTF-8");
        try {
            String jwt = jwtUtil.generateJwt(authentication.getName());
            redisUtil.setCacheObject(KEY + authentication.getName(), jwt, jwtUtil.getExpire(), TimeUnit.SECONDS);
            ServletOutputStream outputStream = response.getOutputStream();
            Result result = Result.success("login success", jwt);
            outputStream.write(JSON.toJSONString(result).getBytes(StandardCharsets.UTF_8));
            outputStream.flush();
            outputStream.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}
